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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2026 fangqiurong <fangqiurong@kylinos.cn>
*/
#include <bpf/bpf.h>
#include <scx/common.h>
#include <time.h>
#include <unistd.h>
#include "dequeue_iter.bpf.skel.h"
#include "scx_test.h"
#define DQ_TARGET 10
#define DQ_DEADLINE_MS 3000
static unsigned long long now_ms(void)
{
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
return ts.tv_sec * 1000ULL + ts.tv_nsec / 1000000;
}
static enum scx_test_status setup(void **ctx)
{
struct dequeue_iter *skel;
skel = dequeue_iter__open();
SCX_FAIL_IF(!skel, "Failed to open");
SCX_ENUM_INIT(skel);
SCX_FAIL_IF(dequeue_iter__load(skel), "Failed to load skel");
*ctx = skel;
return SCX_TEST_PASS;
}
static enum scx_test_status run(void *ctx)
{
struct dequeue_iter *skel = ctx;
struct bpf_link *link;
unsigned long long end;
link = bpf_map__attach_struct_ops(skel->maps.dequeue_iter_ops);
SCX_FAIL_IF(!link, "Failed to attach scheduler");
end = now_ms() + DQ_DEADLINE_MS;
while (skel->bss->dq_count < DQ_TARGET && !UEI_EXITED(skel, uei) &&
now_ms() < end)
usleep(100);
bpf_link__destroy(link);
SCX_EQ(skel->data->uei.kind, EXIT_KIND(SCX_EXIT_UNREG));
if (skel->bss->dq_count < DQ_TARGET) {
SCX_ERR("ops.dequeue() fired only %llu times",
(unsigned long long)skel->bss->dq_count);
return SCX_TEST_FAIL;
}
return SCX_TEST_PASS;
}
static void cleanup(void *ctx)
{
struct dequeue_iter *skel = ctx;
dequeue_iter__destroy(skel);
}
struct scx_test dequeue_iter = {
.name = "dequeue_iter",
.description = "Verify ops.dequeue() can iterate its source user DSQ",
.setup = setup,
.run = run,
.cleanup = cleanup,
};
REGISTER_SCX_TEST(&dequeue_iter)
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